Retractable inner barrel structure of a bolt

ABSTRACT

A retractable inner barrel structure of a bolt includes a bolt handle which is installed inside a latching groove of a flexible outer barrel with a fixing pin and a spring, and is passed through a gliding groove of a gun barrel, so as to be fixed into a restraining part of the gliding groove, upon pulling back the flexible outer barrel. A retractable inner barrel is located inside the flexible outer barrel, and is provided with two racks at two sides of the retractable inner barrel. Moreover, a spring for fixing a gun barrel shroud is mounted on one of the racks, and a pillar and a seat are also located inside the retractable inner barrel. The gun barrel shroud is provided with a latching groove and an adjusting device including a poking switch for adjusting a trajectory is also installed inside the gun barrel shroud.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention relates to a retractable inner barrel structure ofa bolt, and more particularly to a multi-step retractable inner barrelstructure constituted by a utilization of a flexible outer barrel, aretractable inner barrel, a pillar, and a seat.

(b) Description of the Prior Art

As shown in FIG. 1 and FIG. 2, a bolt A1 is latched into a latchinggroove A2 of an inner barrel A of a conventional firearm. An elasticspring A3, is located inside the inner barrel A, and is mounted on aseat A4 at a rear end of the gun barrel. When the bolt A1 pulls back theinner barrel A, the bolt A1, can be fixed in a gliding groove A5 of thegun barrel, so as to fix the inner barrel A in an interior at the rearend of the gun barrel upon putting the inner barrel A into a holdinggroove A6 inside the gun barrel.

However, a part of space inside the firearm needs to be taken uponinstalling the inner barrel A of the firearm. Therefore, it is easy tolimit a shape of the firearm when installing the inner barrel A invarious firearms.

Accordingly, how to eliminate the aforementioned shortcoming is atechnical issue to be solved by the inventor.

SUMMARY OF THE INVENTION

The present invention is to provide a multi-step retractable innerbarrel structure of a bolt mainly constituted by a flexible outerbarrel, a retractable inner barrel, a pillar, and a seat, wherein theouter barrel is provided with a latching groove, and a bolt handle islocated inside the latching groove. The bolt handle is passed through agliding groove of a gun barrel, so as to be fixed in a restraining partof the gliding groove when the flexible outer barrel is pulled back. Agun barrel shroud is located between the retractable inner barrel andthe seat, and is provided with a latching groove which is correspondingto a latching piece mounted on a safety seat. When emplacing theretractable inner barrel into the aforementioned flexible outer barrel,the gun barrel shroud barrel moves backward simultaneously, so as toexpose an adjusting device inside the gun barrel shroud, this enables apoking switch on the adjusting device to be used to provide a user toadjust a trajectory of shooting.

To enable a further understanding of the said objectives and thetechnological methods of the invention herein, the brief description ofthe drawings below is followed by the detailed description of thepreferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a conventional application.

FIG. 2 shows a schematic view of motion of a conventional application.

FIG. 3 shows a perspective view of the present invention.

FIG. 4 shows a perspective view of compartments of the presentinvention.

FIG. 5 shows a perspective view of a portion of compartments of thepresent invention.

FIG. 6 shows a schematic view of motion of the present invention.

FIG. 7 shows a schematic view of an implementation of the presentinvention.

FIG. 8 shows another schematic view of an implementation of the presentinvention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 3, FIG. 4, and FIG. 5, a retractable inner barrel B ofa bolt is composed of a bolt handle C, a flexible outer barrel D, aretractable inner barrel E, a seat F, a gun barrel shroud G, a safetyseat H, and an adjusting device I. The bolt handle C is installed in alatching groove D1 of the flexible outer barrel D with a fixing ping C1and a spring C2. Whereas a bore C3 is located inside the latching grooveD1 for fixing the fixing pin C1. Moreover, the bolt handle C is passedthrough a gliding groove C4 of the gun barrel, so as to fix the bolthandle C into a restraining part C5 of the gliding groove C4 uponpulling back the flexible outer barrel D.

A spring D2 is located inside the flexible outer barrel D, and isconnected to the retractable inner barrel E, which is provided with tworacks E1 at two sides. One of the racks E1 is mounted with a spring G1for fixing the gun barrel shroud G. Moreover, a spring E2 is locatedinside the retractable inner barrel E, and is connected to a pillar F1and the seat F. The flexible outer barrel D, the retractable innerbarrel E, the pillar F1, and the seat F can constitute into themulti-step retractable inner barrel structure B.

The gun barrel shroud G is located between the retractable inner barrelE and the seat F, and is provided with a latching groove G2 which iscorresponding to a latching piece H1 latched onto the safety seat H.When the retractable inner barrel E is emplaced into the aforementionedflexible outer barrel D, the gun barrel shroud G moves backwardsimultaneously, so as to expose the adjusting device I inside the gunbarrel shroud G, this enables a poking switch L1 on the adjusting deviceI to be used to provide a user to adjust a trajectory of shooting.

Referring to FIG. 6, FIG. 7, and FIG. 8, upon using the presentinvention, the bolt handle C on the flexible outer barrel D is pulledback so that the bolt handle C can move inside the gliding groove C4 ofthe gun barrel and be fixed into the retraining part C5 of the glidinggroove C4. In addition, when the bolt handle C is fixed into theretraining part C5 of the gliding groove C4, the retractable innerbarrel moves simultaneously to enter the flexible outer barrel D,thereby accomplishing a first step of retracing motion.

However, when the flexible outer barrel D and the retractable innerbarrel E accomplish the aforementioned first step of retracting motion,the spring E2 located inside the retractable inner barrel E movestowards the pillar F1 and the seat F simultaneously, so as to accomplisha second step of retracting motion between the retractable inner barrelE, the pillar F1, and the seat F.

When the spring E2 located inside the retractable inner barrel E movesto the pillar F1 and seat F, the gun barrel shroud G and the spring Galso move backward at the same time. The gun barrel shroud G is providedwith the latching groove G2 which is corresponding to the latching pieceH1 latched on the safety seat H. When the aforementioned retractableinner barrel E is emplaced into the flexible outer barrel D, the gunbarrel shroud E moves backward at the same time, so as to expose theadjusting device I inside the gun barrel shroud G, this enables thepoking switch I1 on the adjusting device I to be used to provide a userto adjust a trajectory of shooting.

To further manifest the advancement and practicability of the presentinvention, the present invention is compared with a conventionalapplication as follow:

Shortcomings of a conventional application

(1) A holding groove is required for emplacing an inner barrel.

(2) A part of space inside a firearm is taken.

(3) It is easy to limit a shape of a firearm.

(4) It does not have advancement and practicability.

Advantages of the present invention

(1) It is provided with a multi-step retractable inner barrel structure.

(2) It can be used in association with a shape of all kinds of firearm.

(3) It can save an inner space of firearm.

(4) It is not easy to limit a shape of firearm.

(5) It is provided with advancement and practicability.

(6) It is provided with an industrial competitiveness.

It is of course to be understood that the embodiments described hereinis merely illustrative of the principles of the invention and that awide variety of modifications thereto may be effected by persons skilledin the art without departing from the spirit and scope of the inventionas set forth in the following claims.

1. A retractable inner barrel structure of a bolt mainly comprising abolt handle, a flexible outer barrel, a retractable inner barrel, apillar, a seat, a gun barrel shroud, a safety seat, and an adjustingdevice, comprising the bolt handle is installed in a latching groove ofthe flexible outer barrel with a fixing pin and a spring, and is passedthrough a gliding groove of a gun barrel, so as to be fixed into arestraining part of the gliding groove upon pulling back the flexibleouter barrel; the retractable inner barrel being located inside theflexible outer barrel, and racks being located at two sides of theretractable inner barrel, with a spring for fixing the gun barrel shroudmounted on one of the racks; the pillar and the seat being locatedinside the retractable inner barrel; the gun barrel shroud beingprovided with a latching groove which is corresponding to a latchingpiece latched on the safety seat, and the adjusting device being locatedinside the gun barrel shroud and a poking switch for adjusting atrajectory being located on the adjusting device.